The term "restricted visibility" refers to which of the following conditions?

The term "restricted visibility" encompasses any situation where visibility is diminished, making it difficult to navigate safely. This includes but is not limited to fog, heavy rain, mist, smoke, and other environmental factors that can impair one's ability to see clearly. By acknowledging the definition in this broader context, it is understood that restricted visibility can occur under various conditions rather than being tied to just a single factor, such as fog or a specific distance like less than half a mile.

Other options tend to limit the understanding of what "restricted visibility" means. For instance, focusing solely on fog or a specific distance does not account for the full spectrum of conditions that can impact visibility while operating a vessel. Similarly, stating that visibility is restricted only when you cannot see the shore may overlook numerous situations where visibility is still limited but where the shore may still be in sight. Understanding that "restricted visibility" includes any condition where visibility is limited is crucial for safe navigation on the water.